Duplicating recorder



July 31, 1945. I w. H. TRIBBLE 2350,4182

DUPLICAT ING RECORDER Filed March so, 1942 2 sheets'sheet l ATTORNEY lJ? .INV ENTOR July 31, 1945. w TR|BB| E 2,380,482

DUPLICATING RECORDER some July :1, ms

UNITED STATES PATENT OFFICE DUPLICATING RECORDER wuuam n. 'lribble,

N. Y, a-ignor to Application so, 1042, Serial No. new

6 Claims.

The present invention relates to facsimile recording scanners and. inparticular, to scanners for making two or more copies at the same time.

Facsimile recording consists in marking point by point to produce arecord. A convenient carrier for the record is a sheet 0! paper. Onemethod of marking on a paper sheet is electrolytically by passing amoistened paper sheet between conducting electrodes carrying a signalcurrent. These electrodes are conveniently in.

the form of a linear-electrode and a helix the intersection betweenmhiehforms a recording point. Rotation of the helix causes the point to moveacross the sheet and longitudinal movement of the paper completes thescanning process.

The nets for making two or more copies simultaneously. lBriefly. theinvention consists in two or morelinearelectrodeaonsforeachco .used

1 source.

In drawinsszt mishowsinperlpectlveoneformofthe pl'esentinvcntion.

mzshowsanendviewoithsdeviceshown mountedonshafttandrotatedhymotorlthmasuitahle gearboxl.

Ohthesurfaceotdrum lismountedametalhelixl. Suitably present inventionconcerns helical scan- I, II and H. Recording is accomplished byrotatingdrum l and moving sheets 0. II and II at relative rates, so thatthe moving intersection between helix I and linear electrodes l, I and Iaccomplishes the scanning along a line and the motion of sheets i, I.and 'II completes the scanning of the sheets. Relative motions of drum Iand sheets 0, II and ll are shown by the arrows. y

In order that all three copies may be, phased in the same way. thelinear. electrodes are displacedalongtheaxisoftheheli'xordrumbyan amountsuch that the axial displacement in percentsse of the lensth of a 360degree helix is equal to the percentage of displacement around thecircumference. In this way, at any instant. recording is performed atcorresponding points along a scanning line on each of the three sheets.

Proper phasing of the drum for centering the so recording on-one sheetthen' automatically centers the recording on the remaining sheets. Forspecial requirements, other relative axial and circumferential spacingsmay be'employed.

' Fig. 2 shows an end view of the form of the invention shown in Big. 1.The relation of helix .ltolineare1ectrodes,landlisshown. Sheet so 8|,control Umayunwindfromaroll II andmayberewound after recording on rollit. Similarly.

sheets II: and It may unwind from rolls ll and II and wind upon rolls IIand II respectively. 1"lg.2alsoshowsinblockdiagramaradiollconnectedtoantenna llandground 2| feeding recordingsignalsto lead 28from point I! and toleads 28, II and II from point II.

III. 3 shows a modified form of the invention,lnasimilarmanner,tubell.includingplata sridflandcathodot'l-faadslnsarfilter lH'l-Jl-ll-IU connected between tcr- 'minal i1 and grid II. Thus,electrodes l and I record a second and independent modulation upon sheetll.

Likewise, tube ll having electrodes II, 39 and II feeds electrode 8 thrulead 21 connected to plate II and receives a third selected sub-carrierthru filter 5i--I2-53-54--5I connected to grid II and terminal 21. Thethird image, as represented by modulation of the third sub-carrier, isthus recorded by electrodes 5 and O on sheet i i.

Fig. 4 shows the development of drum I with its helical electrode 5 andindicating the positions of the three linear electrodes 0, 1 and 8.Along the sides of the developed drum I are shown degree indicationsmarking various points of helix I in terms of angular degrees around thedrum. Thus helix 5 extends once and a half or 540 degrees around drum I.Linear electrodes 5, I and I are shown dotted at a point in the rotationof the drum I where each is starting the scanning of a line. This isaccomplished by spacing the electrodes around the drum and by displacingthem along the axis of the drum in echelon fashion by amountsproportional to the circumferential spacing. Thus electrode 1 is 90degrees from electrode 8, electrode 8 is 90 degrees from electrode 1 anddistance ab equals distance be. It should be noted, as well. thathelical electrode I extends beyond a complete 360 degrees by 180 degreeswhich is equal to the angular distance between electrode 6 and electrode8. Many -modifications are evidently possible while still keeping thesegeneral relationships.

It will be evident that many'combinations are possible, as, forinstance, two similar copies and ticipated by the present invention. Theinvention concerns the use and relation of more than one linearelectrode with a common helical electrode regardless of the method ofmarking.

While only two forms of the present invention i have been shown anddescribed, it will be evident that many modifications are possiblewithin the spirit and scope of the invention, as set forth in theappended claims. I

air f 1 access:

What is claimed is:

i. A multiple copy facsimile recorder including in combination, a drum,a helical electrode carried by said drum, and a plurality of linearelectrodes spaced around the circumference of said drum and displacedalong the axis of said drum in echelon fashion for cooperating with saidhelical electrode to print substantially equally phased records on aplurality of record sheets.

2. A multiple copy facsimile recorder including in combination, a drum,a helical electrode extending more than once around said drum, and aplurality of linear electrodes spaced around said drum andproportionally displaced in echelon fashion along'the axis of said drumfor making substantially equally phased records on a plurality ofrecording sheets.

3. A multiple copy facsimile recorder including in combination, a drum,a helical electrode extending more than once around said drum, aplurality of linear electrodes around said drum and displaced in echelonfashion along the axis of said drum, and a source of recording signalsmnnected between said linear electrodes and said helical electrode formaking a plurality of similar records on a plurality of record sheets.

4. A multiple copy facsimile recorder including in combination, a drum,a helical electrode extending more than once around said drum, aplurality of linear electrodes spaced around said drum and displaced inechelon fashion along the axis of said drum, a source of a plurality ofmarking signals, means for separating said signals and means forapplying each of said signals between one of said linear electrodes andsaid helical electrode for producing a plurality of difierent records ona corresponding number of record sheets.

5. A multiple copy facsimile recorder including in combination, a drum,a helical electrode extending more than once around said drum, aplurality of linear electrodes spaced around said drum and displaced inechelon fashion along the axis of said drum, a source of a plurality ofindependent marking signals, and means for applymg each of said signalsbetween one of said linear electrodes and said helical electrode forproducing a plurality of dilierent records on a corresponding number ofrecord sheets.

6. A multiple copy facsimile recorder including in combination, arotatable helical electrode, and a plurality of cooperative linearelectrodes spaced around the circumference of said helix and displacedin echelon fashion along the axis of said helix for marking a pluralityof record sheets in substantially the same phase.

WILLIAM H. 'I'RIBBLE.

